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Chou R, Ahmed AY, Morasco BJ, et al. Living Systematic Review on Cannabis and Other Plant-Based Treatments for Chronic Pain: 2023 Update [Internet]. Rockville (MD): Agency for Healthcare Research and Quality (US); 2023 Aug. (Comparative Effectiveness Review, No. 250.)

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Living Systematic Review on Cannabis and Other Plant-Based Treatments for Chronic Pain: 2023 Update [Internet].

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Figure D-8 is a forest plot comparing pain severity that stratifies studies of dronabinol and nabilone during a 1 to 6 month followup period. There are 7 studies, 3 of which are in the dronabinol subgroup and 4 that are in the nabilone subgroup. The mean difference for the studies in the dronabinol subgroup is −0.35 (95% confidence interval −1.08 to 0.44) with an I-squared value of 45.1% and a p-value of 0.162. The mean difference for the studies in the nabilone subgroup is −1.59 (95% confidence interval −2.49 to −0.82) with an I-squared value of 0% and a p-value of 0.422. The overall mean difference is −0.95 (95% confidence interval −1.81 to −0.25) with an I-squared value of 60.3% and a p-value of 0.019. The p-value for heterogeneity between groups is 0.003.

Figure D-8Stratified results on pain severity of RCTs using dronabinol and nabilone (short term, 1 to 6 months followup)

Abbreviations: CBD = cannabidiol; CI = confidence interval; EP = end point; FM = fibromyalgia; NPP = neuropathic pain; PL = profile likelihood; SD = standard deviation; TD = total dose; THC = tetrahydrocannabinol; VP = visceral pain.

a Namisol® is a purified, plant-based product, but grouped with synthetic dronabinol because they are chemically identical.

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